Force save status.
xls_SetSave(flag)
save status %t or 1 and %f or 0.
Force modified status.
xls_NewExcel(); xls_AddWorkbook(); xls_SetVisible(%t); xls_SetData("C2", "text"); xls_SetSave(%t); xls_SetSave(1); xls_Close(); xls_Quit();